Cutting-torch.



J. J. STROBOT.

CUTTING TORCH.

APPLICATION fILED JULY x0. 191s.

Patented Oct. 15, 1918.

. Jonn I. szrnolaor, or oIIIcA e ILLmoIs, ASSIGNOR 'runme comramr, or,CHICAGO, ILLINOIS, A. CORPORATION or ILLINOIS.

'ro- FIDELITY nnass manor-Ac- 1 To all mama ma Mam.-

'Be it known that L'Jonn. J. S'moiao'r, a citize'n of the United Statesof America, 'and f resident of Chicago, Illinois, have mventeda certainnew. and useful Improvement in Cutting-Torches, of which the followingis a specification.

This inventionrelatestocutting torches of that kind inwhichoxygenand'acetylene gas are mixed-in suitable proportions to'produce; 1ahoti'fiame for cutting steel or other metal.

Generally stated, the objectof the invention is to provide a novel andimproved conbinations tendin struction of the nozzle and head of thetorch,"

for the'purpos'e of more efl'eetively combining the acetylene gas withthe oxygen, and to prevent fiashin back of the flame within the nozzleand T1 It isalso an object to-provldecertain details -and features ofconstruction and comto increase the general efliciency and desirabilityof a cutting torch of this particular-character.

To these andother useful ends the invention' consists in mattershereinafter set forth 7 and claimed and shown in the accompanyingdrawings, in ,which Figure -1vis a longitudinal sectionof the I head. of

the cutting-torch embodying the principles oftheinventionshowingthe,inner nozzle III'SldBTBlBVfltlOHu Fig. 2 is a side elevation-ofsaidinner '-lnozzle separated from the other parts of the 35.: v Fig.3 is anend viewof said inner nozzle. Fig. 4 isa section on line 4-4 in Fig. 1.As thus illustrated, thehead of the torch-'- a boss 2 into" ead.

comprises a casting 1, havin which high pressure-tube 3 is screwed, and

a boss 4 Into which the acetylene tube 5- is screwed, or both of thesetubes can be brazed r in place if desired. gThe casting 1 contains abore having a mixing chamberfi which is open at its lower end beingdisposed vertically and slightly inclined relatively to the horizontaltubes. The upper portlon 7 of this bore 6 is somewhat reduced and threaded and is connected by a passage 8 with the end of the tube 3 to receivethe high pressure oxygen. The boss 4 contains a bore 9 whichconnects'the bore 6 with the tube 5, and the inner tube 10, whichcarries the so-called pre-heatin oxygen, extends through the tube 5 anthrough the bore 9 to a point Specification of Letters Patent.

f ead, thereby to insure greater safety in the handling ofthe torchwhere it is flush with the side of the bore 6,

for the passage of the acetylene gas. The

r r Patented Oct. 15,1918. fa licauonmeuui 10,1918. Serial No. 244,211.r I

inner nozzle has a threaded portion 11 which I is screwed into thereduced threaded bore portion7, and has a cylindrical portion 12 whlchextends downward in the bore 6, the latter 'belng of greater diameterthan said cylmdrloal portion. :At a point below the bottom of thecasting l the inner nozzle is provided w1th a short hexagonal portion13,-

and below the latter witha downwardly and gradually tapered portion 14which terminates at its lower end in a flange 15, this inner nozzle bemmade of brass or other suithas a able metal. so, said inner nozzle shortreduced portion 16 below the flange 15 and an enlarged lower endportion17 which is slightly tapered in. a downward direct1on. The outer nozzlehas a hexagonal upper end portion 18 which is screwed upon theexternally threaded boss or lower end pbrtlon 19 of the casting 1, andthe lower end portion 20 of this outer nozzle fits the tapered endportion 17 of the inner nozzle.

Internally, it will be seen the outer nozzle has a bore 21 whichincloses the tapered port ion 14 and the lower portion of the hexagonalportion 13,- and also the flange 15 of the inner nozzle."v This bore 21is straight and terminates, preferably, at its lower end in a shoulder22 which is slightly below the upper end portion 17 of the inner nozzle.The upper end of this bore 21 terminates in a bevel 23, and an enlargeddistributing cham- ."ber 24 is formed immediately above this bevel,below the lower end portion 19 of the casting 1 previously described.The

flange 15 has its annular edge disposed a distance from the sidesof thebore 21, and the inner nozzle thus formed, has a central longitudinalbore or passage 25 for the high pressure oxygen. The portion 17 isprovided with a plurality of longitudinally disposed passages 26, whichcommunicate at their upper ends with the space just below the flange 15,and which are open at their lower ends to discharge the mixture ofacetylene gas and oxygen which passes from the tubes 5 and 10 into thebore or mixingchamber'6 then into the distributing chamber 24:, and theninto the bore 21, in a manner that will be readily understood.Preferably,

. tion.

these passages 26 converge slightly in a downward direction so that theets of acetylene gas and oxygen will meet or come together at a ointsome distance from the end of the nozz e, and will combine w1th the Jetof high pressure oxyglen discharged from the passage when t e torch 1s1n opera- The acetylene gas and oxygen entering the bore 6 arethoroughly mixed before they pass around the flange 15 to enter theupper ends of the passages 26, and 1t W111. be seen that the passage 27in the end portion 28 of the tube 10 extends close to the side of thecylindrical portion 12 of, the inner .nozzle, and that the bore 9 is ofgreater diameter than this end portion 28 of the mner tube, so that theacetylene gas is discharged into the bore 6 before it encounters theoxygenv supplied through the tube 10, whereby the initial mixing occursin the bore 6 around theinner nozzle. Also, the

I flange 15 is disposed immediately above the upper ends of the passages26 and extends sufficiently close to the inner surface of the bore 21 toprevent flashing back of the flame Within the bore 21,.so that thisdanger 1s considerably reduced. The hexagonal por tion 13 fits'the upper,end of the bore 21, or very nearly so as may be desired, so that aplurality (en: ,in. this case). of parallel passages. are provided toconnect the cham- "ber 24: with'the space surrounding the reducedtaperedportion. 14, whereby the. m1xture of oxygen and acetylene gas ismore or less divided while passing from the chamber 24 into the bore21,'this-arrangeinent tending to insurethe desired results, not onlywith regard to the proper mixing and, supplying of the oxygen andacetylene gas to the passages 26, but also with respect tothedesirability of having the torch head so constructed thatflashing-back of the flame within the nozzle will be less liable tooccur,

In addition, the hexagonal portion 13 is adapted-to receive a wrench forthe pur so that the torch will be safer to-handle.

v,gose of screwing the inner nozzle into the sad or casting, and for thepurpose 'of-removing the inner nozzle when such is nec essaryordesirable.

What I claimas my invention is z- 1. In a torch, an; outer nozzle, aninner nozzle mclosed by the outer nozzle, and a head to which saidnozzles are removably connected,.said inner nozzle having an enlargedendportion provided with passages,

"and having a flange disposed in position to extend over the inner endsof said passages.

2. A structure asspecified in claim 1, said inner nozzle having adownwardly tapered portion immediately above said flange, a.

polygonal portion immediately above said tapered portion, and acylindrical port on tapered portion with the screwed into saidimmediately above said polygonal portion, said head and outernozzleproviding space around said tapered and polygonal and cy-- lindricalportions of the inner nozzle.

3. A structure as specified in claim 1, said enlarged end portion of theinner nozzle being slightly tapered, and the outer nozzle beinginternally tapered to fit said tapered portion of the inner nozzle.

4. In a torch, an inner nozzle and an outer nozzle, and ahead to whichsaid nozzles are removably connected, said inner nozzle having anenlarged end portion provided with longitudinally extending passages,and having a polygonal portion connected by a downwardly tapered portionto said end portion of the inner nozzle, said tapered portion beinglonger than said polygonal portion, and the inner nozzle having acylindrical portion above said polygonal portion, with a longitudinalpassage extending through the inner nozzle from end to end thereof.

5. A structure as specified in claim 4 said outer nozzle having astraight bore of uniform' diameter WhlCh incloses said tapered portionand which terminates at its lower end in a shoulder slightly below theupper end of said enlarged lower end portion of lower tube to saidchamber, said inner tube extending through. said, bore and alsoterminating at said chamber. a

.8. In a cutting torch, an inner nozzle and an puter nozzle, the innernozzle having a tapered outer end portion to tightl fit the end of theouter nozzle, a polygona middle portion, which is entirely within theouter nozzle, a reduced portion connecting the a reduced inner end porton which extends into the outer nozzle to joint-the polygonal portionand which is threaded to screw into the torch, a lon tudinal boreextending from one end 0 verging passages in said tapered portion, saidinner nozzle having a flangedisposed close above the upper endsingpassages. v 7 Ina tt1ng-- torch,-a head having a plurality oinlet-passe es,' .an inner nozzle hea an outer nozzle said inner, nozzleto the. other end thereof, and a,plural ityof con-.

polygonal portion,

of said convergeeann the lower bore and provided with convergmg outletpassages, with a reduced portion between the polygonal portion and the dmixing tapered portion, said polygonal portion pro viding a plurality ofparallel passages leading from said distributing chamber to said 2@eavity, and the end ortion of said outer nozzle being formed elow saidlower bore to receive the tapered end portion of the inner nozzle toform a tight joint between the ends of the two nozzles, so that the dis-25 charge from said converging passages is concentrated .in thedischarge from said inner nozzle, said reduced portion of the innernozzle being tapered downward and having a flange disposed close abovethe up- 30 per ends of said converging passages.

Signed by me at Chicago, Illinois, this 22d day of June,'1918.

JOHN J. s'r-RoBo'r.

